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| 1 /* | |
| 2 * Copyright (C) 2013 Google Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions are | |
| 6 * met: | |
| 7 * | |
| 8 * * Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * * Redistributions in binary form must reproduce the above | |
| 11 * copyright notice, this list of conditions and the following disclaimer | |
| 12 * in the documentation and/or other materials provided with the | |
| 13 * distribution. | |
| 14 * * Neither the name of Google Inc. nor the names of its | |
| 15 * contributors may be used to endorse or promote products derived from | |
| 16 * this software without specific prior written permission. | |
| 17 * | |
| 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 */ | |
| 30 | |
| 31 #include "bindings/core/v8/CustomElementConstructorBuilder.h" | |
| 32 | |
| 33 #include "bindings/core/v8/CustomElementBinding.h" | |
| 34 #include "bindings/core/v8/DOMWrapperWorld.h" | |
| 35 #include "bindings/core/v8/ExceptionState.h" | |
| 36 #include "bindings/core/v8/V8Binding.h" | |
| 37 #include "bindings/core/v8/V8Document.h" | |
| 38 #include "bindings/core/v8/V8HTMLElement.h" | |
| 39 #include "bindings/core/v8/V8HiddenValue.h" | |
| 40 #include "bindings/core/v8/V8PerContextData.h" | |
| 41 #include "bindings/core/v8/V8SVGElement.h" | |
| 42 #include "core/HTMLNames.h" | |
| 43 #include "core/SVGNames.h" | |
| 44 #include "core/dom/Document.h" | |
| 45 #include "core/dom/ElementRegistrationOptions.h" | |
| 46 #include "core/dom/custom/CustomElementDefinition.h" | |
| 47 #include "core/dom/custom/CustomElementDescriptor.h" | |
| 48 #include "core/dom/custom/CustomElementException.h" | |
| 49 #include "core/dom/custom/CustomElementProcessingStack.h" | |
| 50 #include "wtf/Assertions.h" | |
| 51 | |
| 52 namespace blink { | |
| 53 | |
| 54 static void constructCustomElement(const v8::FunctionCallbackInfo<v8::Value>&); | |
| 55 | |
| 56 CustomElementConstructorBuilder::CustomElementConstructorBuilder(ScriptState* sc
riptState, const ElementRegistrationOptions& options) | |
| 57 : m_scriptState(scriptState) | |
| 58 , m_options(options) | |
| 59 { | |
| 60 ASSERT(m_scriptState->context() == m_scriptState->isolate()->GetCurrentConte
xt()); | |
| 61 } | |
| 62 | |
| 63 bool CustomElementConstructorBuilder::isFeatureAllowed() const | |
| 64 { | |
| 65 return m_scriptState->world().isMainWorld(); | |
| 66 } | |
| 67 | |
| 68 bool CustomElementConstructorBuilder::validateOptions(const AtomicString& type,
QualifiedName& tagName, ExceptionState& exceptionState) | |
| 69 { | |
| 70 ASSERT(m_prototype.IsEmpty()); | |
| 71 | |
| 72 v8::TryCatch tryCatch(m_scriptState->isolate()); | |
| 73 | |
| 74 if (!m_scriptState->perContextData()) { | |
| 75 // FIXME: This should generate an InvalidContext exception at a later po
int. | |
| 76 CustomElementException::throwException(CustomElementException::ContextDe
stroyedCheckingPrototype, type, exceptionState); | |
| 77 tryCatch.ReThrow(); | |
| 78 return false; | |
| 79 } | |
| 80 | |
| 81 if (m_options.hasPrototype()) { | |
| 82 ASSERT(m_options.prototype().isObject()); | |
| 83 m_prototype = m_options.prototype().v8Value().As<v8::Object>(); | |
| 84 } else { | |
| 85 m_prototype = v8::Object::New(m_scriptState->isolate()); | |
| 86 v8::Local<v8::Object> basePrototype = m_scriptState->perContextData()->p
rototypeForType(&V8HTMLElement::wrapperTypeInfo); | |
| 87 if (!basePrototype.IsEmpty()) { | |
| 88 if (!v8CallBoolean(m_prototype->SetPrototype(m_scriptState->context(
), basePrototype))) | |
| 89 return false; | |
| 90 } | |
| 91 } | |
| 92 | |
| 93 AtomicString namespaceURI = HTMLNames::xhtmlNamespaceURI; | |
| 94 if (hasValidPrototypeChainFor(&V8SVGElement::wrapperTypeInfo)) | |
| 95 namespaceURI = SVGNames::svgNamespaceURI; | |
| 96 | |
| 97 ASSERT(!tryCatch.HasCaught()); | |
| 98 | |
| 99 AtomicString localName; | |
| 100 | |
| 101 if (m_options.hasExtends()) { | |
| 102 localName = AtomicString(m_options.extends().lower()); | |
| 103 | |
| 104 if (!Document::isValidName(localName)) { | |
| 105 CustomElementException::throwException(CustomElementException::Exten
dsIsInvalidName, type, exceptionState); | |
| 106 tryCatch.ReThrow(); | |
| 107 return false; | |
| 108 } | |
| 109 if (CustomElement::isValidName(localName)) { | |
| 110 CustomElementException::throwException(CustomElementException::Exten
dsIsCustomElementName, type, exceptionState); | |
| 111 tryCatch.ReThrow(); | |
| 112 return false; | |
| 113 } | |
| 114 } else { | |
| 115 if (namespaceURI == SVGNames::svgNamespaceURI) { | |
| 116 CustomElementException::throwException(CustomElementException::Exten
dsIsInvalidName, type, exceptionState); | |
| 117 tryCatch.ReThrow(); | |
| 118 return false; | |
| 119 } | |
| 120 localName = type; | |
| 121 } | |
| 122 | |
| 123 ASSERT(!tryCatch.HasCaught()); | |
| 124 tagName = QualifiedName(nullAtom, localName, namespaceURI); | |
| 125 return true; | |
| 126 } | |
| 127 | |
| 128 CustomElementLifecycleCallbacks* CustomElementConstructorBuilder::createCallback
s() | |
| 129 { | |
| 130 ASSERT(!m_prototype.IsEmpty()); | |
| 131 | |
| 132 v8::TryCatch exceptionCatcher(m_scriptState->isolate()); | |
| 133 exceptionCatcher.SetVerbose(true); | |
| 134 | |
| 135 v8::MaybeLocal<v8::Function> created = retrieveCallback("createdCallback"); | |
| 136 v8::MaybeLocal<v8::Function> attached = retrieveCallback("attachedCallback")
; | |
| 137 v8::MaybeLocal<v8::Function> detached = retrieveCallback("detachedCallback")
; | |
| 138 v8::MaybeLocal<v8::Function> attributeChanged = retrieveCallback("attributeC
hangedCallback"); | |
| 139 | |
| 140 m_callbacks = V8CustomElementLifecycleCallbacks::create(m_scriptState.get(),
m_prototype, created, attached, detached, attributeChanged); | |
| 141 return m_callbacks.get(); | |
| 142 } | |
| 143 | |
| 144 v8::MaybeLocal<v8::Function> CustomElementConstructorBuilder::retrieveCallback(c
onst char* name) | |
| 145 { | |
| 146 v8::Local<v8::Value> value; | |
| 147 if (!m_prototype->Get(m_scriptState->context(), v8String(m_scriptState->isol
ate(), name)).ToLocal(&value) || !value->IsFunction()) | |
| 148 return v8::MaybeLocal<v8::Function>(); | |
| 149 return v8::MaybeLocal<v8::Function>(value.As<v8::Function>()); | |
| 150 } | |
| 151 | |
| 152 bool CustomElementConstructorBuilder::createConstructor(Document* document, Cust
omElementDefinition* definition, ExceptionState& exceptionState) | |
| 153 { | |
| 154 ASSERT(!m_prototype.IsEmpty()); | |
| 155 ASSERT(m_constructor.IsEmpty()); | |
| 156 ASSERT(document); | |
| 157 | |
| 158 v8::Isolate* isolate = m_scriptState->isolate(); | |
| 159 v8::Local<v8::Context> context = m_scriptState->context(); | |
| 160 | |
| 161 if (!prototypeIsValid(definition->descriptor().type(), exceptionState)) | |
| 162 return false; | |
| 163 | |
| 164 const CustomElementDescriptor& descriptor = definition->descriptor(); | |
| 165 | |
| 166 v8::Local<v8::String> v8TagName = v8String(isolate, descriptor.localName()); | |
| 167 v8::Local<v8::Value> v8Type; | |
| 168 if (descriptor.isTypeExtension()) | |
| 169 v8Type = v8String(isolate, descriptor.type()); | |
| 170 else | |
| 171 v8Type = v8::Null(isolate); | |
| 172 | |
| 173 v8::Local<v8::Object> data = v8::Object::New(isolate); | |
| 174 V8HiddenValue::setHiddenValue(m_scriptState.get(), data, V8HiddenValue::cust
omElementDocument(isolate), toV8(document, context->Global(), isolate)); | |
| 175 V8HiddenValue::setHiddenValue(m_scriptState.get(), data, V8HiddenValue::cust
omElementNamespaceURI(isolate), v8String(isolate, descriptor.namespaceURI())); | |
| 176 V8HiddenValue::setHiddenValue(m_scriptState.get(), data, V8HiddenValue::cust
omElementTagName(isolate), v8TagName); | |
| 177 V8HiddenValue::setHiddenValue(m_scriptState.get(), data, V8HiddenValue::cust
omElementType(isolate), v8Type); | |
| 178 | |
| 179 v8::Local<v8::FunctionTemplate> constructorTemplate = v8::FunctionTemplate::
New(isolate); | |
| 180 constructorTemplate->SetCallHandler(constructCustomElement, data); | |
| 181 if (!constructorTemplate->GetFunction(context).ToLocal(&m_constructor)) { | |
| 182 CustomElementException::throwException(CustomElementException::ContextDe
stroyedRegisteringDefinition, definition->descriptor().type(), exceptionState); | |
| 183 return false; | |
| 184 } | |
| 185 | |
| 186 m_constructor->SetName(v8Type->IsNull() ? v8TagName : v8Type.As<v8::String>(
)); | |
| 187 | |
| 188 v8::Local<v8::String> prototypeKey = v8String(isolate, "prototype"); | |
| 189 if (!v8CallBoolean(m_constructor->HasOwnProperty(context, prototypeKey))) | |
| 190 return false; | |
| 191 // This sets the property *value*; calling Set is safe because | |
| 192 // "prototype" is a non-configurable data property so there can be | |
| 193 // no side effects. | |
| 194 if (!v8CallBoolean(m_constructor->Set(context, prototypeKey, m_prototype))) | |
| 195 return false; | |
| 196 // This *configures* the property. DefineOwnProperty of a function's | |
| 197 // "prototype" does not affect the value, but can reconfigure the | |
| 198 // property. | |
| 199 if (!v8CallBoolean(m_constructor->DefineOwnProperty(context, prototypeKey, m
_prototype, v8::PropertyAttribute(v8::ReadOnly | v8::DontEnum | v8::DontDelete))
)) | |
| 200 return false; | |
| 201 | |
| 202 v8::Local<v8::String> constructorKey = v8String(isolate, "constructor"); | |
| 203 v8::Local<v8::Value> constructorPrototype; | |
| 204 if (!m_prototype->Get(context, constructorKey).ToLocal(&constructorPrototype
)) | |
| 205 return false; | |
| 206 | |
| 207 if (!v8CallBoolean(m_constructor->SetPrototype(context, constructorPrototype
))) | |
| 208 return false; | |
| 209 | |
| 210 V8HiddenValue::setHiddenValue(m_scriptState.get(), m_prototype, V8HiddenValu
e::customElementIsInterfacePrototypeObject(isolate), v8::True(isolate)); | |
| 211 if (!v8CallBoolean(m_prototype->DefineOwnProperty(context, v8String(isolate,
"constructor"), m_constructor, v8::DontEnum))) | |
| 212 return false; | |
| 213 | |
| 214 return true; | |
| 215 } | |
| 216 | |
| 217 bool CustomElementConstructorBuilder::prototypeIsValid(const AtomicString& type,
ExceptionState& exceptionState) const | |
| 218 { | |
| 219 if (m_prototype->InternalFieldCount() || !V8HiddenValue::getHiddenValue(m_sc
riptState.get(), m_prototype, V8HiddenValue::customElementIsInterfacePrototypeOb
ject(m_scriptState->isolate())).IsEmpty()) { | |
| 220 CustomElementException::throwException(CustomElementException::Prototype
InUse, type, exceptionState); | |
| 221 return false; | |
| 222 } | |
| 223 | |
| 224 v8::PropertyAttribute propertyAttribute; | |
| 225 if (!v8Call(m_prototype->GetPropertyAttributes(m_scriptState->context(), v8S
tring(m_scriptState->isolate(), "constructor")), propertyAttribute) || (property
Attribute & v8::DontDelete)) { | |
| 226 CustomElementException::throwException(CustomElementException::Construct
orPropertyNotConfigurable, type, exceptionState); | |
| 227 return false; | |
| 228 } | |
| 229 | |
| 230 return true; | |
| 231 } | |
| 232 | |
| 233 bool CustomElementConstructorBuilder::didRegisterDefinition() const | |
| 234 { | |
| 235 ASSERT(!m_constructor.IsEmpty()); | |
| 236 | |
| 237 return m_callbacks->setBinding(CustomElementBinding::create(m_scriptState->i
solate(), m_prototype)); | |
| 238 } | |
| 239 | |
| 240 ScriptValue CustomElementConstructorBuilder::bindingsReturnValue() const | |
| 241 { | |
| 242 return ScriptValue(m_scriptState.get(), m_constructor); | |
| 243 } | |
| 244 | |
| 245 bool CustomElementConstructorBuilder::hasValidPrototypeChainFor(const WrapperTyp
eInfo* type) const | |
| 246 { | |
| 247 v8::Local<v8::Object> elementPrototype = m_scriptState->perContextData()->pr
ototypeForType(type); | |
| 248 if (elementPrototype.IsEmpty()) | |
| 249 return false; | |
| 250 | |
| 251 v8::Local<v8::Value> chain = m_prototype; | |
| 252 while (!chain.IsEmpty() && chain->IsObject()) { | |
| 253 if (chain == elementPrototype) | |
| 254 return true; | |
| 255 chain = chain.As<v8::Object>()->GetPrototype(); | |
| 256 } | |
| 257 | |
| 258 return false; | |
| 259 } | |
| 260 | |
| 261 static void constructCustomElement(const v8::FunctionCallbackInfo<v8::Value>& in
fo) | |
| 262 { | |
| 263 v8::Isolate* isolate = info.GetIsolate(); | |
| 264 | |
| 265 if (!info.IsConstructCall()) { | |
| 266 V8ThrowException::throwTypeError(isolate, "DOM object constructor cannot
be called as a function."); | |
| 267 return; | |
| 268 } | |
| 269 | |
| 270 if (info.Length() > 0) { | |
| 271 V8ThrowException::throwTypeError(isolate, "This constructor should be ca
lled without arguments."); | |
| 272 return; | |
| 273 } | |
| 274 | |
| 275 ScriptState* scriptState = ScriptState::current(isolate); | |
| 276 v8::Local<v8::Object> data = v8::Local<v8::Object>::Cast(info.Data()); | |
| 277 Document* document = V8Document::toImpl(V8HiddenValue::getHiddenValue(script
State, data, V8HiddenValue::customElementDocument(isolate)).As<v8::Object>()); | |
| 278 TOSTRING_VOID(V8StringResource<>, namespaceURI, V8HiddenValue::getHiddenValu
e(scriptState, data, V8HiddenValue::customElementNamespaceURI(isolate))); | |
| 279 TOSTRING_VOID(V8StringResource<>, tagName, V8HiddenValue::getHiddenValue(scr
iptState, data, V8HiddenValue::customElementTagName(isolate))); | |
| 280 v8::Local<v8::Value> maybeType = V8HiddenValue::getHiddenValue(scriptState,
data, V8HiddenValue::customElementType(isolate)); | |
| 281 TOSTRING_VOID(V8StringResource<>, type, maybeType); | |
| 282 | |
| 283 ExceptionState exceptionState(ExceptionState::ConstructionContext, "CustomEl
ement", info.Holder(), info.GetIsolate()); | |
| 284 CustomElementProcessingStack::CallbackDeliveryScope deliveryScope; | |
| 285 Element* element = document->createElementNS(namespaceURI, tagName, maybeTyp
e->IsNull() ? nullAtom : type, exceptionState); | |
| 286 if (exceptionState.throwIfNeeded()) | |
| 287 return; | |
| 288 v8SetReturnValueFast(info, element, document); | |
| 289 } | |
| 290 | |
| 291 } // namespace blink | |
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Chromium Code Reviews
Issue 1914923002:
Rename all existing custom element classes as V0 (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master